Replacement for 668356-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 668356-B21 (668356-B21 - HP ProLiant Blade Server 2 x Intel Xeon E5-2450 2.1GHz)? Pro Disk Network ships HP drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the 668356-B21
| SKU | 668356-B21 |
|---|---|
| Product | 668356-B21 - HP ProLiant Blade Server 2 x Intel Xeon E5-2450 2.1GHz |
| Current price | $345.26 |
| Stock status | In Stock |
| Detail page | View 668356-B21 › |
Drop-in replacements for 668356-B21
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
660652-L21 - HP 2.10GHz 8.0GT/s QPI 20MB L3 Cache Socket LGA1356 Intel Xeon E5-2450 8-Core Processor for ProLiant DL360e Gen8 Server
SKU: 660652-L21
Price: $205.26
660652-B21 - HP 2.10GHz 8.0GT/s QPI 20MB L3 Cache Socket LGA1356 Intel Xeon E5-2450 8-Core Processor for ProLiant DL360e Gen8 Server
SKU: 660652-B21
Price: $254.74
661120-L21 - HP 2.10GHz 8.0GT/s QPI 20MB L3 Cache Socket LGA1356 Intel Xeon E5-2450 8-Core Processor for ProLiant DL380e Gen8 Server
SKU: 661120-L21
Price: $267.11
661120-B21 - HP 2.10GHz 8.0GT/s QPI 20MB L3 Cache Socket LGA1356 Intel Xeon E5-2450 8-Core Processor for ProLiant DL380e Gen8 Server
SKU: 661120-B21
Price: $267.11
667373-B21 - HP 2.10GHz 8.0GT/s QPI 20MB L3 Cache Socket LGA1356 Intel Xeon E5-2450 8-Core Processor for ProLiant BL420C Gen8 Server
SKU: 667373-B21
Price: $534.07
667373-L21 - HP 2.10GHz 8.0GT/s QPI 20MB L3 Cache Socket LGA1356 Intel Xeon E5-2450 8-Core Processor for Proliant BL420C Gen 8 Server
SKU: 667373-L21
Price: $534.07
678903-B21 - HP 2.10GHz 8.0GT/s QPI 20MB L3 Cache Socket LGA1356 Intel Xeon E5-2450 8-Core Processor for ProLiant ML350e Gen8 Server
SKU: 678903-B21
Price: $944.59
730778-B21 - HP 2.10GHz 8.0GT/s QPI 20MB L3 Cache Socket LGA1356 Intel Xeon E5-2450 8-Core Processor for Proliant SL4540 Gen 8 Server
SKU: 730778-B21
Price: $1,152.32
730777-B21 - HP 2.10GHz 8.0GT/s QPI 20MB L3 Cache Socket LGA1356 Intel Xeon E5-2450 8-Core Processor for ProLiant SL4540 Gen8 Server
SKU: 730777-B21
Price: $1,152.32
730777-L21 - HP 2.10GHz 8.0GT/s QPI 20MB L3 Cache Socket LGA1356 Intel Xeon E5-2450 8-Core Processor for Proliant SL4540 Gen 8 Server
SKU: 730777-L21
Price: $1,152.32
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.